Police Complaints Authority - United Kingdom - was created in
1985.
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Wikipedia has a list of the motorways in the United Kingdom. The
Motorway Archive and Wikia also have a list of all of the motorways
in the United Kingdom.
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The Police and Police Force were invented by the British and
there are police force's in every country in the world.
As for the best i would have to say Hong Kong police force as
they were based/trained by British S.A.S special forces.
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The Ministry of Defence Police (MDP) was formed in 1971, following the amalgamation of several police forces that were responsible for policing military sites and installations in the United Kingdom.